Drill-steel-retaining device



Feb. 24, 1931. c. A. HUL TQUIST 1,793,619

DRILL STEEL RETAINING DEVICE Original Filed Feb. 16 25 INIY/ENTOR. CHQELES A. fiuLr czs'r Y B n/l/m/a/MJ A TTORNEY pat entecl Feb. 24, 1931 v amen. HULTQUIs'r, or LosANGE'LEs, CALIFORNIA, ess'mivon'ro rivhnrEnnnnr WARE I mi Ln-srnnri-nnrnmrnd nnvron f v J origi naliapplicationg:filed February 16, 925, Serial No. 9,480. iii iaea gana this application filed and;

v 12 ,11927; seriarn'o.'1e0,e41. 1;

My invention relates to'a drill-steel retain-f ing device for drilling machines, and'is aidlvisional applica'tionof the subject'matter of my previous application for drill-steelretaim ingdevic'es, filed 'inthe United States Patent Office, February 16th, 1925, under Serial-No.

9,480, patented May 20, 1930, No.'1,75,8,949.

, The objectsof this inventionare first, to provide a particularly simple,' economical, durable, and i efiicient devicefor preventing the drill steel of drilling machines from be coming, detached from the Chuck of the machine in which3it'is loosely seated,and one which vcan be readily thrown into and out of steel retaining positionysecond, to provide a device of this class whichis pivotally mounted, at the side of the'barrel' of the drilling mar chine "and which maybe positively locked in a" drill-steel retaining position, "and which 5:0 my still beshifteda eonsiderable distance about its pivotal axis so as to reduce to a minimum the danger of the retainer flying back to the steel retaining positionandin urlng' the hands or fingers" of the "operator; third,- to

provide a'device of this 'class {which will remain in a positivelocked.retaining position "even though thedrillsteel is forced with its abutment againstthe same; and, fourth, to

I V provide, asa whole, a novelly constructeddevice of this class and one which will not read 'ily deteriorate or get'out of order. With these, and otherobjects' in View as will appear hereinafter, my invention consists of certain novel features of construction, combination and arrangement of parts'and portions, as will be hereinafter described in detail and particularly set forth in the append- V ed claims,'referenee beinghad to the accomdotted' lines 'inanangular' or out of the-li Y 3 Parts d portions throughout "theivi'ews ofthe drawings; z

suitable construction, the type shownloeing with a shoulder, or abutment, 4 spaced from the end of the'drill steel inserted inlt'he bar;

. way position for removing the drill steel.' r i Llke characters'of reference referitosiini- '55 The-dr1ll1ng' machine, ln'dicated byi the character 1 in" the; drawings, may beof' any 1'81. The drill steel Sis permi't ted tdslidei'in and; out of the barrel 2 readily, whenfthe re taini'ng devic'e,to'be' described; hereinafter, isfl- I v 1-70 7 not in such position asto preventsuch moves 'ment of the drill steel The retainer, orretainingdevice, indicated by R,- is generally U-shapedfandpivotedwith its legs, indicated by 6, at: the opposite sides of the barrel 2; At the 'cross,'or' connecting portlon of. the arms or legs 6 ofthe u-S'hapee retainer, is a' transvers'el-y, extendingsemi circular, or U-shaped abutmentf). Said abutment 5' partly surrounds the drill steel; whenv the retainer is in a downward or'rretaining the outer face of the abutment, or shoulder so 7 I position," and is adapted to beengaged by g 4 duringthe. drilling operation, to retain the i I drill Steel in the barrel; The ends-of the legs ofthe semi-circular, or uss'haped abutment 5 are provided with upwardlyextending lugs 5a to positively prevent the retainer from be.-

ing shifted out of the way when the drill steel is inserted into thebarrel with its shoulder, or. abutment, 4 against the abutment 5.

1' The legs Gare bifurcated, or forked,intermediate their: ends, the plan-es extending through the furcations of eachleg being perpendicular to the plane extending through the two legs'g6. The inner ends of the bifurcated portions, or forks, ofsaid 1egsprovide semicircular ,bea rings 604 which are positioned againstand around theun'der sidespfstuds 7- projecting laterally from the sidesofithe barrel 2 and positioned'in alignment with the axis thereof. The furcations 6b of the retainer are in the form of bolts and serve as guides. On the furcations of each leg is slidably mounted a bearing plate 8 which is normally positioned against the upper side of the stud-7 in opposed relationto the bean ing portion 6a. At the outer endsofthe furcations of each leg is mounted a spring retaining plate9 which is held in position on said furcations by nntslO screwed onto the outer ends of the furcations Between the plates 8 and 9, and between thefur'cations 6b ofeach leg, is positioned a compression spring 11 wlnch'iis retained in position be tween said plates by lugs 8a and 9a extend ing toward each other-from the plates 8 and Thus the retainer, or retaining device, is.

9, respectively. L

1 The upper sideof one, or both, of the studs 7 is provided witha longitudinal, substan-' 'tially semicircular depression; 7a into which extends, whenthe retainer is in a steel retaining position, a correspondingly shaped projection, or ear, .8? which extends downwardly from the middle portionof a circular depression 80 into which the upper side of the pivot porti0n,*or stud, 7 normally extends.

lockedrelative to the pivot means by the interlocking means of the studs 7 and the plates 8against movement unless considerable force' is brought to bear against the lower end of the retainer and only when the abutment 4 is clearof thelugs 5a,

The mounting of the retaineron the studs iny the; manner; described, permits the retainer to 'i be shifted w more than ninety; degrees about itspivotalaxisand thus reduces to minimum the danger of the retainer slipping backto its retainingpo'sitionand pinchmg or crushingthe hands or fingers of the operator.

ThOughI have shown and des cribed aparticular construction, combinat on and arrangement of parts and portions l do not.

wish tobe limited to this particular construction, combination and arragement, but desire to include in the scope of my invention the construction, combination and arrangement substantially as set forth inthe' appended claims. i ,c i 1 Having thus described my invention, what I claim as new and desire to secure by Letters Patent is: r i 1. The combination with the barrel of a drilling machine, andra drill steel in the bar-c rel, of a. pivot. means extending to the side ofsaid barrel, a drill-steelretainer hayin a portion at the end of said barrel engageable by an abutment on said drill steel and hav-- ing means extending to the side of said barrel, said means having abifurcatedlportion straddling said 'pivot means and havinga pivot bearing atthe inner end of said bifurcated portionzengaging the rounded un-r M dersi'de of the pivot means, a bearing'membifurcated portion and engaging the upper side of said'pivot means, said bearing member slidably mounted on the furcations of the i ber and pivot means having portions adapted c to hold theretainer in a drill-steelvretaining, position, a spring retainingplate slidably mounted on and between said furcations, nuts at the outer ends of said furcations for hold 'ing-said spring retaining plate in-ip'osition;

and a compression spring positioned between said slidable bearing and said plate, and between said furcations- The ,combination with the barrel of a drilling inachine, and a drill steeljin'the barrel, of studs projecting laterally from the a barrel, a vU-shaped drill-steel retainen; the legs thereof having forked portions forming,

undersides, of the studs, the connecting porti'on of thelegs of the U-shaped member being engageable by an abutment on said drill steel,

at theirinner ends, bearings engaging the bearingsislidably moun'tedon the furcations of said forked "portions,v said bearings and said studs hav ng portions adapted tohold the j retainerin la drill-steel retaining positionj, spring retaining plates slidably mounted on and between said 'furcations, nuts at the outer endsof said 'furcations for holdin said spring retaining plates. i-n position ,an

compression springs positioned between said .1 slidablebearings and-said plates, and between. the furcations of each fork. 7

; 3. The combination with a ba -rrel of a drill ingmachine and a drill steel in the barrel, of a pivot; means .extending,tothe side ,of said. barr'eha drillsteel -retainer havinga POItionat the end of said barrel engageab e byan abutment on said drill steel and having means extending; to the side ofjsaid barrel,

.the furcations, means at-the outer ends ,of the furcat-ions for holdlng the spring retaining plate in position thereon, and a compression ing and said plate. V l

In testimony whereof, I have hereunto set my hand at Los Angeles,} Qalifornia, this 3rddayof Januarv, 1927. i

onanrlns spring positioned between said slidablefbear- 

